Grinding-mill



2 sheetssheet 1'.

(NuMode.)

'A. J.& W. B. TALLEY.

' GRINDING MILL. No. 593,823. Patented Nov. 16,1897.

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- Wed/W NITED STATES PATENT .Prion ANDREW J. TALLEY AND WILLIAM B.TALLEY, OF BELL POINT, OHIO.

' GRlNDlNe-MlLL SPECIFICATION forming part of Letters Patent No.593,823, dated November 16, 1897.

Application filed May 2l, 1897.

To all whom t may concern:

Be it known that we, ANDREW J. TALLEY and WILLIAM B. TALLEY, of -BellPoint, in the county of Delaware and State Vof Ohio, have inventedcertain new and useful Improvements in Grinding- Mills; and we do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others'skilled inthe art to which itappertains to make and use the same. This invention relates toimprovements in grinding-mills, and has more particular relation tomills for grinding or reducing middlings.

The invention consists of certain novel constructions, combinations, andarrangements of parts, all of which will be hereinafter moreparticularly set forth and claimed.

In the accompanying drawings, Figure 1 represents a perspective view ofthe devices embodying our invention. Fig. '2 represents a centralvvertical section through the same. Fig. 3 represents a verticaltransverse section of said devices on the line 0c of Fig. 1. Fig. 4represents a vertical transverse'section through said devices on theline y y of Fig. 1, and Fig. 5 represents an enlarged detail perspectiveview of the feeding and grinding screw.

1 in the drawings represents the containing-casing; 2, the feed-hopper;3, the feeding and grinding screw; 4, the movable pressure-block, and 5the operating-handle.A

The casing 1 may be'constructed of any desirable material and comprisesa base-plate 6 and side and end walls 7 and 8, respectively. Said casing1 is provided internally with a plurality of vertical longitudinalpartitions v 9 9, forming a feeding-trough 10. These partitions do notextend the full length of the casing 1, but terminate some distance fromone end of the same, at which point they are connected by an end piece11, having a circular aperture 12 formed therein and provided with aiiange 13, which forms a shallow rectangular chamber 14 about saidaperture. The vbase of said casing is formed with a discharge-openingl5, which lies immediately below the forward end of the flange 13, sothat the middlings discharged from the same will fall through saidopening into a Serial No. 637,636. (No model.)

suitable chute or receptacle arranged below said opening.

The feed-hopper 2, which may be of any desired construction, ispreferably formed, as shown, of two transverse partitions 9 9, connectedbyany suitable lon gitudinally-inclined partition and mounted in thecasing 1, so as to discharge into the rear end of the feedingtrough, theforward portion of said feedingtrough being closed by a top plate 16.The pressure-block 4 issuitably hinged to said plate 16, so that itnormally hangs suspended against the flanges 13 and thus closes thechamber 14. This block is provided with a pressure-handle 17, whichextends through a suitable vertical slot 18, formed in the end of thecasing, and is provided with an adjustable weight 19, whereby thepressure of said block may be regulated at will. Said screw 3 isjournaled at one end in the casing 1, so as to project longitudinallythrough the trough 10. The projecting journal end of said screw ispreferably squared, as at 20, for the application of the operatingcrank-handle 5a.` If so desired, a suitable belt-wheel may be applied tothis end of the journalshaft in lieu of the crank-handle, so that thedevice may bel operated by any suitable power mechanism. The forward endof the screw is supported by resting within the circular aperture 12,formed in the end block 11. its forward end, so as to lie in planesextending at right angles to the axis of the screw. This end portion ofthe screw is` roughened or corrugated, so as to present a grinding Themetal forming the screw is bent at.

surface for reducing the middlings to the proper consistency, whichreduction or grinding is caused by the rotation of the end of the screwin proximity to the pressure-block 4.

It will be observed from the foregoing description that the middlings orother grain placed in the hopper 2 will pass therefrom into the trough10 and from thence will bev fed forward by the rotation of the screw 3until they reach the forward end of the trough, when they will passthrough the aperture 12 and into the shallow chamber 14. The roughenedends of the screw will 4then force the grain or middlings against thesurface of the pressure-block 4 and reduce or pulverize the TOO same.lVhen the chamber 14 becomes lilled with pulverized material, thepressure caused therein by the continued feeding of the screw 3 willcanse the pressure-block 4 to turn upon its hinges and permit thepulverized material to escape through the aperture 15 in the bottoni ofthe casing. By this means the grain is properly ground upon reaching theend of the screw and then discharged from the machine, said operationtaking place while fresh grain is being discharged from the hopperintothe trough and fed forward by the screw, so as to be forced in turnagainst the pressureblock and reduced to the proper degree.

The degree of fineness to which it is desired to reduce the grain ormiddlings may be regulated at will by adjusting the weight 1`9`back andforth upon the lever or arm. 17. Should thegrain. at any time becomechokedi in the chamber 14, so as to interfere with the action ofthescrew 3, the hinged pressure-block 4 will immediately yield againstthe iniiuence of the weight 19 and thus` permit the excess of materialto escape from-thechamber. By the peculiar construction of the end ofthe screw the grain which has been fed through the trough is drawn ontoor between the roughened end of said screw andthe pressurebloelt` by aswedging actionl the pressure of which gradually increases as the screwrevolves until the grain is. crushed and pulverized by con tact with theroughened or corp rugated. portion.

le preferably close thetop of the casing 1 by a` cover. 21, formed withan. opening 22, which latter is located directly above the mouth of thefeed-hopper, so that the grain or middlings` may be readily placed inthe same.

The construction of the machine is very simpleand cheap, but at thesame'time very eifective, as thegrainhas simply tobe placed intothehopper 2 and the screw rotatedY to effect the speedy reduction orpulverization of thesame.

le do not wish to limit ourselves to any particular construction ofconveyingfscrew,

as any one of the differenttypes of Archimedean'screws may be employedwitlrequal facility.

It willbe observed from the lforegoing description that the middlingsfed forward through the trough by the screw will be jammed into-thespace-between the endA of the screw and the yieldin g block and willthus becrushed or pulverized toany desired degree of iineness, accordingto the adjustmentA of the-weight upon the pressure-arm.

le further do not wish tolimit ourselves toaroughened end of thegrinding-screw, as the grinding action may be effected with-a smoothas-well as a rough construction. This mill is particularly desirable inthe reduction ofmiddlings, because of the peculiar rubbing. action whichoccurs between the particles of the grain, the end ofthe screw, andthepressure-block. This peculiar grinding action cannot be secured by rollsin which the grain is simply mashed, and therefore said grain cannot bereduced to the consistency of grain passed through a machine constructedaccording to this invention. In fact a saving of fully twenty-live percent. of fiour from the feed77 usually left by grinding-rolls may beaccomplished by this machine with its peculiar rubbing and grindingaction.

Having thus described our invent-ion, what we claim as new, and desireto secure by Leti ters Patent, is-

1. In a grinding-mill, the combination with asuitable casing, of arotatable feeding and grinding screw mounted in the same and having agrinding end, a movable pressure-piece mounted in proximity to thegrinding end of said screw, and? devices for holding saidlpressure-piecein such` position with al yielding pressure whereby the grain is forcedbetween said grinding. end andv said pressure-piece, substantially asdescribed.

2L In a grinding-mill, the combination with a suitable casing, of arotatable feeding and grindingV screw mounted in the same and=hav ing aroughened' or corrugated grinding end, a movable pressure-piece mountedin proximity to said. grindingv end, and' devicesL for holding saidpressure-piece in position in relation'v to said grinding. end with. ayyielding pressure, substantially as described.

3. In a grinding-mill, the combination with a suitable casing, ofyafeeding-troughmounted therein, a rotatable feeding and grinding screwmounted in: said troughy andf` having a grinding end, a'movablepressure-piece adapted to-normally liefin proximity to saidegrindingend= andcontact with the end of said trough, and' devicesfor holdingsaidpressurepiece inposition with a yieldingpressure, substantiallyasdescribed;

4.r In'a'grinding-mill, the combinationwith a` suitable casing,v of arotatable feeding'and grinding screw mounted in the same and'having agrinding end, a movable pressure-block mounted: in proximity to said.`grinding end, and a weight mountedV on said pressure-block andadaptedtonormally hold it in proximity to said grinding endwith ayielding pressure, substantially as described.

5. In agrinding-mill, the combinationzwith a suitable casing, cfafeeding and grinding screw mounted therein: and hav-ing'the metalforming. the same bent at one end at right angles to the axis of thescrew and'roughened or corrugated, a movable pressure-block` cngagingtheend' of said screw and means for forcing said pressure-block intoengagement with said screw under a yielding. pressure, substantially asdescribed.

G. In a grinding-mill, the combination with a suitable casing, of afeeding-trough mounted therein, an endblock mounted in one end of saidtrough andformedwith a circular opening and av shallow chamber outsideof said opening, a feeding and grinding screw mounted in said trough soas to project IOO IIO

and a Weight mounted on said block for holding it in place in proximityto said grinding end With a yielding pressure, substantially asdescribed. g

In testimony whereof We have signed this specification in the presenceof two subscribing Witnesses.

ANDREW J. TALLEY. WILLIAM B. TALLEY. Witnesses: i

MILTON STRASBURGER, PACA OBERLIN.

